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BQ2056VPN Datasheet

  • BQ2056VPN

  • Low-Dropout Li-Ion Charge-Control ICs with AutoComp⑩ Charge...

  • 12頁

  • TI

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bq2056/T/V
Low-Dropout Li-Ion Charge-Control ICs with
AutoComp鈩?Charge-Rate Compensation
Features
鉃?/div>
Significant reduction in charge
time with AutoComp charge-rate
compensation
鉃?/div>
Ideal for low-dropout linear regu-
lator design
鉃?/div>
1-cell, 2-cell, and programmable
multicell versions
鉃?/div>
Low-cost charger implementation
with minimum number of exter-
nal components
鉃?/div>
Programmable current limit to
accommodate any battery size
鉃?/div>
Interface to external trickle
charger for reviving deeply dis-
charged batteries
鉃?/div>
High-accuracy charge control
鉃?/div>
Sleep mode for low power con-
sumption
鉃?/div>
Direct battery voltage sense
w i t ho ut r es i st i v e d i v i d e r s
(bq2056 and bq2056T)
鉃?/div>
Small 8-pin SOIC package
General Description
The bq2056 series ICs are low-cost
precision linear charge-control de-
vices for Li-Ion batteries. With a
minimum number of external compo-
nents, the bq2056 is a complete low-
dropout linear charger. The dropout
voltage is typically less than 0.5V
when the bq2056 is used with an ex-
ternal PNP transistor or P-channel
FET. Features include proprietary
automatic charge-rate compensation
(AutoComp) and a trickle-charger in-
terface output for reviving deeply
discharged cells. The bq2056 sup-
ports a single-cell 4.1V pack and the
2056T supports a two-cell 8.2V pack.
The bq2056V may be externally pro-
grammed for supporting other volt-
ages. All versions feature a sleep
mode for low-power applications.
Functional Block Diagram
+
SNS
2.0V
TRKL
BAT
COMP
K
COMP
+
V
REG
CC
SNS
V
SS
INH
100mV
+
BDbq2056.eps
Pin Connections
Pin Names
INH
Charge-inhibit input
Trickle-charge
interface output
Ground
Charge-rate
compensation input
V
CC
SNS
BAT
CC
Current sense input
Battery voltage input
Charge control
output
Supply input
INH
TRKL
VSS
COMP
1
2
3
4
8
7
6
5
VCC
CC
BAT
SNS
TRKL
V
SS
COMP
8-Pin DIP or Narrow SOIC
PN-205601.eps
10/98 B
1

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